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Electric storage device

a technology of storage devices and electric current, which is applied in the direction of cell components, sustainable manufacturing/processing, and final product manufacturing, etc., can solve the problems of reducing yield, affecting the quality of finished products, and difficult handling during the manufacturing process, so as to prevent the adhesion of conductive impurities, prevent the shorting of the terminal, and prevent the effect of shorting

Inactive Publication Date: 2013-10-24
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a new electric storage device that can make sure the parts that stick out of the device are stable and have a specific shape. This helps to improve the performance of the device.

Problems solved by technology

That is, with the terminal structure described above, handling during the manufacturing process is difficult.
This may lead to production of defective products, lower yield, and lower productivity.
However, reducing the thickness t further reduces the strength, and may further lower the stability of the shape and position of the positive-electrode lead portion 103a and the negative-electrode lead portion 104a.

Method used

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Examples

Experimental program
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Effect test

example 1

[0169]The electric double layer capacitor described in the first embodiment was made, and the effects of tensile modulus of elasticity of the joining member on electrical characteristics and peel resistance were examined.

[0170][Sample Preparation]

[0171](Sample Number 1)

[0172]First, an element body was prepared, which includes positive-electrode collector layers and negative-electrode collector layers formed of aluminum and positive-electrode active material layers and negative-electrode active material layers formed of activated carbon. Additionally, a positive electrode terminal and a negative electrode terminal were prepared, which have respective terminal body portions formed of aluminum. Next, positive electrode layers, each including a positive-electrode collector layer and a positive-electrode active material layer, and negative electrode layers, each including a negative-electrode collector layer and a negative-electrode active material layer, were stacked in a predetermined ...

example 2

[0203]The electric double layer capacitor described in the third embodiment was made, and a sweep vibration test was performed to evaluate resistance to vibration.

[0204][Sample Preparation]

[0205]As in Example 1, an element body was prepared, which includes positive-electrode collector layers and negative-electrode collector layers formed of aluminum and positive-electrode active material layers and negative-electrode active material layers formed of activated carbon. Additionally, a positive electrode terminal and a negative electrode terminal were prepared, which have respective terminal body portions formed of aluminum. Next, positive electrode layers, each including a positive-electrode collector layer and a positive-electrode active material layer, and negative electrode layers, each including a negative-electrode collector layer and a negative-electrode active material layer, were stacked in a predetermined order, with porous polyethylene separators each interposed between adja...

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Abstract

An element body having a plurality of positive electrode layers, a plurality of negative electrode layers, and separator layers each interposed between adjacent positive and negative electrode layers. A package includes a box-like package body portion containing the element body, and a flat package edge portion connected to the package body portion. A positive electrode terminal and a negative electrode terminal are bent at terminal body portions extending outward from the package edge portion to form a positive-electrode bent portion and a negative-electrode bent portion, respectively. The bent portions are joined to the package edge portion, with joining members.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation of PCT / JP2011 / 079895 filed Dec. 22, 2011, which claims priority to Japanese Patent Application No. 2010-288161, filed Dec. 24, 2010, the entire contents of each of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to electric storage devices, and particularly to an electric storage device, such as an electric double layer capacitor, having an improved terminal structure.BACKGROUND OF THE INVENTION[0003]With the spread of portable electronic devices, such as cellular phones, notebook computers, and digital cameras, various electric storage devices, such as electric double layer capacitors, lithium-ion capacitors, and lithium-ion secondary batteries, have been actively researched and developed as cordless power supplies for the electronic devices.[0004]In recent years, electric storage devices of this type have attracted particular attention not onl...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H01G11/26H01M2/30H01G11/72H01G11/74H01G11/80H01G11/82H01M50/105H01M50/178H01M50/514H01M50/548H01M50/553H01M50/564
CPCH01G11/26H01M2/30H01G11/72H01G11/74H01G11/80H01G11/82H01M10/0436Y02T10/70Y02E60/10Y02P70/50H01M50/514H01M50/564H01M50/105H01M50/178H01M50/553H01M50/548Y02E60/13
Inventor MORI, ATSUTAKAUEDA, YASUHIKOHATA, TAKAYUKITAKAUCHI, MASAKI
Owner MURATA MFG CO LTD